Development of Position Detector with Large Sensing Area Using Frosted Glass
This paper proposes a new position detector using frosted glass and four photo detectors. Four photo detectors are arranged under the four corners of the rough surface of frosted glass. When this sensor is irradiated by laser pointer, the light repeats reflection in the frosted glass and arrives at...
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Published in | Applied Mechanics and Materials Vol. 103; pp. 600 - 605 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Zurich
Trans Tech Publications Ltd
01.01.2012
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Subjects | |
Online Access | Get full text |
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Summary: | This paper proposes a new position detector using frosted glass and four photo detectors. Four photo detectors are arranged under the four corners of the rough surface of frosted glass. When this sensor is irradiated by laser pointer, the light repeats reflection in the frosted glass and arrives at the photo detectors. The light intensity decreases by the increasing of distance between the photo detector and the irradiating point. Therefore, the distance between a photo detector and the irradiation point can be worked out from the output of the photo detectors. Thus, the light irradiation point can be derived from the distances with the four photo detectors. This sensor is low cost and has a large sensing area. In addition, this sensor also can be used as a pointing device because the movement of the light on the frosted glass can be judged. |
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Bibliography: | Selected, peer reviewed papers from the 3rd International Conference on Precision Instrumentation and Measurement 2011 (CPIM 2011), July 18-21, 2011, Xiangtan, China |
ISBN: | 9783037852606 3037852607 |
ISSN: | 1660-9336 1662-7482 1662-7482 |
DOI: | 10.4028/www.scientific.net/AMM.103.600 |